Explain why a microbe must be able to firmly adhere to the host tissues to cause disease
What will be an ideal response?
The body has numerous mechanisms for flushing microbes from the tissues, such as coughing
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The ability to smell ____
a. manifests as a 1:1 relationship between an odor and a specific receptor b. specific chemicals can indicate a possible reaction to a chemically related drug c. specific chemicals will predict the effectiveness of antidepressants d. is mediated by a family of about 400 genes e. is mediated by the synthesis of olfactory receptors in the brain
Arbuscular mycorrhizae are characterized by all of the following features except
A. They are the most common mycorrhizal type. B. Fungal hyphae penetrate plant root cells. C. They are seen in the earliest vascular plant fossils. D. The fungus can associate with several species of plants. E. The fungal component is a glomeromycete.
Which of the following is the cornea, and what is its function?
a. A—allows light into the eye b. B—fluid that protects tissue c. C—has light-absorbing pigments d. D—receives sensory input
Collecting ducts in the kidney lead immediately into
the a. renal cortex. b. renal medulla. c. renal pelvis. d. ureter. e. urethra.